基于位移的钢框架结构可靠度研究

摘要

Petrochemical structures are often characterized by uneven distribution of stiffness due to the complicated arrangement of its equipment pipelines , and designs are often overly conservative .In order to analysis of the steel frame structure based on dis-placement , the finite element software was used to model , calculate and analyze the steel frame structure of refining platform .In the PDS (the probability design system) module, the Monte Carlo method was used to analyze the reliability of structural displacement in the PDS module to obtain the calculation results of the relationship between the maximum displacement and the random input variables of the steel frame structure of the refining platform .The results revealed that the section size of the steel frame structure was more con-servative, resulting in the waste of steel.In order to realize the design of the structure's economy, we should optimize and redesign the cross-sectional dimensions of non-sensitive factors in the graph based on the calculated sensitivity diagram to meet the structural re-liability, and draw a safe and economical design plan for the future petrochemical industry , which could provide reference for the fu-ture design of steel frame structure in petrochemical industry .%石化结构经常因其设备管线复杂的布置而造成结构的刚度分布不均匀,设计经常会过于保守.为了对基于位移的钢框架结构可靠度进行研究,利用有限元软件对炼化平台钢框架结构进行建模、 计算、 分析,在PDS(概率设计系统)模块中运用Monte Carlo法对结构位移的可靠度进行分析,获取炼化平台钢框架结构的最大位移与随机输入变量之间关系的计算结果.该结果表明该炼化平台钢框架结构的设计比较保守,造成了钢材的浪费.为了实现结构设计的经济性,应根据计算得到的灵敏度图,在满足结构可靠性的基础上,将图中非敏感性因子的截面尺寸进行优化再设计,得出安全经济的设计方案,为以后石油化工行业钢框架结构的设计提供参考.